Foam topology bending versus stretching dominated architectures
Foam topology bending versus stretching dominated architectures
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DOI：
10.1016/s1359-6454(00)00379-7
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发表时间：
2001-04-02
期刊：
影响因子：
9.4
通讯作者：
Fleck, NA
中科院分区：
文献类型：
--
作者：
Deshpande, VS;Ashby, MF;Fleck, NA
细胞固体可以通过细胞壁的弯曲或拉伸而变形。虽然大多数蜂窝固体是以弯曲为主，但那些以拉伸为主的蜂窝固体在结构应用中具有更高的重量效率。在这项研究中，我们研究了拓扑标准，通过分析刚性（或其他）的钉接框架，包括非伸展支柱，决定了细胞固体的变形机制。我们证明了一类特殊的晶格结构材料的最小节点连接是6，对于二维泡沫和三维泡沫。同样，由桁架核心组成的夹层板面对平面桁架，在所有加载状态下都需要最小节点连通性为9才能承受拉伸主导的变形。(C) 2001材料学报Elsevier Science Ltd.出版。版权所有。
Cellular solids can deform by either the bending or stretching of the cell walls. While most cellular solids are bending-dominated, those that are stretching-dominated are much more weight-efficient for structural applications. In this study we have investigated the topological criteria that dictate the deformation mechanism of a cellular solid by analysing the rigidity (or otherwise) of pin-jointed frameworks comprising inextensional struts. We show that the minimum node connectivity for a special class of lattice structured materials to be stretching-dominated is 6 fur 2D foams and 12 for 3D foams. Similarly, sandwich plates comprising of truss cores faced with planar trusses require a minimum node connectivity of 9 to undergo stretching-dominated deformation for all loading states. (C) 2001 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.